CN103175672B - A kind of construction machinery radiator air tunnel and using method thereof simulating dust storm impact - Google Patents
A kind of construction machinery radiator air tunnel and using method thereof simulating dust storm impact Download PDFInfo
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- CN103175672B CN103175672B CN201310064039.5A CN201310064039A CN103175672B CN 103175672 B CN103175672 B CN 103175672B CN 201310064039 A CN201310064039 A CN 201310064039A CN 103175672 B CN103175672 B CN 103175672B
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Abstract
The invention discloses a kind of construction machinery radiator air tunnel and the using method thereof of simulating dust storm impact, comprise an air duct, air duct comprise connect successively air in section, front blowing section, side and bottom surface blowing section, hourglass control section, heat spreader module, the stable section of testing the speed, wind speed measuring device.Adopt the fan blowing of three different-diameters, blade quantity and leaf angles to produce combined airflow, according to statistical study actual wind speed Changing Pattern, adopt the frequency of quasi-Monte Carlo Simulation Control fan variable-frequency motor, simulation field strong wind mobility status.The sandstone of different-diameter is stored in hourglass, and by leaking husky area bottom leading screw adjustment hourglass, control to leak husky quantity, the filter screen in the middle part of hourglass, can screen out larger-size sandstone.The air-flow produced by three desk fans rolls the sandstone under filter screen filter, impacts on heat spreader module, judges whether heat spreader module reaches the intensity of opposing dust storm, realizes the process of the construction machinery radiator that simulation dust storm impacts.
Description
Technical field
The present invention relates to a kind of experimental provision, particularly relate to a kind of construction machinery radiator air tunnel and the using method thereof of simulating dust storm impact.
Background technology
The feature that engineering machinery has work full load, environment temperature is high, vibratory impulse is large, stream time is long, design heat spreader module is generally considered to solve heat load problem.But the engineering machinery worked in Gobi desert, desert, be very easy to be subject to the situation that dust that strong wind rolls and dust storm impact nacelle, the fin of heating radiator can break and block its flowing by the grains of sand at a high speed, thus affects the normal use of heat spreader module.Therefore to the heat management system of engineering machinery, not only to consider thermal load situation, the high strength of heat spreader module, anti-mud dirt are also had higher requirements.When the thickness of heat radiator fin is thicker, there is higher intensity, but have the shortcoming that quality is heavy, cost is high, and when fin thickness is too thin, fin distortion that dust storm causes cannot be resisted again and damage.If have on such experimental facilities energy realistic simulation Gobi desert, desert, the situation of large wind volume sandstone impact radiator module, can detect its withstand strength, and determine the thickness of heating radiator, will have larger practical value.Current automobile radiators wind-tunnel mainly detects heat exchange and the resistance to flow situation of heating radiator, does not have the function that analog radiator module is impacted by dust storm.
Summary of the invention
Object of the present invention is exactly to solve the problem, a kind of construction machinery radiator air tunnel and the using method thereof of simulating dust storm impact are provided, this device can be simulated different wind speed in field environment and be rolled sandstone and blow the situation of hitting heat spreader module, judges whether the thickness of construction machinery radiator fin meets requirement of strength.
To achieve these goals, the present invention adopts following technical scheme:
A kind of construction machinery radiator air tunnel simulated dust storm and impact, comprise an air duct, described air duct comprise connect successively air in section, front blowing section, side and bottom surface blowing section, hourglass control section, heat spreader module, the stable section of testing the speed, wind speed measuring device; Be provided with front fan blowing in described front blowing section, described front fan blowing is arranged on the variable-frequency motor of front fan blowing; The side of described side and bottom surface blowing section is provided with side direction air duct, the bottom surface of described side and bottom surface blowing section is provided with bottom surface air duct, side blow fan is provided with in described side direction air duct, described side blow fan is arranged on the variable-frequency motor of side blow fan, be provided with bottom surface fan blowing in the air duct of described bottom surface, described bottom surface fan blowing is arranged on the variable-frequency motor of bottom surface fan blowing; Hourglass is provided with directly over described hourglass control section.
Be provided with filter screen above described hourglass, below described hourglass, be provided with horizontal leading screw.
Described front fan blowing comprises the blade composition of 7 Unequal distance, is respectively: 43 °, 47 °, 53 °, 49 °, 57 °, 59 ° by the angle of the center line of clockwise each blade.The diameter of bottom surface fan blowing is 1/3 of front fan blowing diameter, is made up of the blade of 5 Unequal distance, is respectively by the angle of the center line of clockwise each blade: 71 °, 67 °, 73 °, 77 °, 72 °.The diameter of side blow fan is 1/2 of front fan blowing diameter, is made up of the blade of 5 Unequal distance, is respectively by the angle of the center line of clockwise each blade: 79 °, 71 °, 70 °, 67 °, 73 °.Find through finite element modal analysis, in the fan blowing combination of different leaves and angle, the resonance that said fans combination produces is minimum.
Described hourglass is for storing sandstone, and the leading screw below described hourglass leaks husky area for adjusting bottom hourglass, to reach the effect controlling to leak husky amount.
Described filter screen is used for screening out larger-size sandstone, and according to different needs, the filtering accuracy of filter screen is 0.8mm-1.5mm, and the material of filter screen is stainless steel alloy.
Described heat spreader module comprises water radiator, intercooler, oil radiator and their combination, the structural shape of water radiator, intercooler, oil radiator is not for windowing corrugated tube type, ripple belt, serrate, trapezoid belt and pipe type, and material is aldary and aluminium alloy.
The concrete using method of the construction machinery radiator air tunnel that described simulation dust storm impacts is: collect field wind speed flowing change, count the regularity of distribution, then the velocity of rotation of fan is controlled by variable-frequency motor, after the air-flow combination that fan turns has been entrainmented, the air current flow of combination is changed and the similar object realizing simulation dust storm and impact of actual airflow;
The concrete control method of the velocity of rotation of described fan is:
According to the flowing law of air-flow in field environment, adopt quasi-Monte Carlo simulation adjustment rotation speed of the fan situation of change,
Front fan blowing rotating speed n1 meets Weibull distribution rule, and change once continued for 10 seconds:
n1＝2000·(-lnr
i)
0.42
Bottom surface fan blowing rotating speed n2 meets Weibull distribution rule, and change once continued for 10 seconds:
n2＝1800·(-lnr
i)
0.37
Side blow rotation speed of the fan n3 meets Weibull distribution rule, and change once continued for 10 seconds:
n3＝1600·(lnr
i)
0.45
Wherein r
ifor pseudo random number, adopt the simulation of Prime Modulus multiplicative congruential method:
X
i＝16897·X
i-1(mod(2
32-1))
r
i＝X
i/(2
32-1)
Above formula mod() represent the meaning of remainder, X
ifor natural number, wherein X
0=3319; I increases naturally with change frequency, i be greater than 0 natural number.
Described wind speed measuring device, adopts on the circular hollow section of the stable section of testing the speed of Pitot tube after test section and measures by six measuring points waiting anchor ring to amass layout, obtain the wind speed of the air-flow of the cooperation of three kinds of fans.
The present invention adopts the process of three fan blowing simulation strong wind blast stones, described front fan blowing, the side blow fan resonance effect that can reduce blowing process cause different from angle the diameter of ground fan blowing.According to the field actual wind speed Changing Pattern gathered and statistical is separated out, adopt the pseudo random number of Monte Carlo method structure Weibull distribution, the frequency of adjustment variable-frequency motor, thus control the velocity of rotation of fan, then measure with Pitot tube and record the wind speed by wind-tunnel.The sandstone of different-diameter is stored in hourglass, adopt leading screw, by leading screw, rotation is become mobile, husky area is leaked for adjusting bottom hourglass, to reach the effect controlling to leak husky amount, the filter screen of to be a material be at the middle part of hourglass stainless steel alloy, filtering accuracy is 0.8mm-1.5mm, for screening out larger-size sandstone.Roll the sandstone under filter screen filter by the air-flow of three desk fans, impact on heat spreader module, judge whether heat spreader module reaches the intensity of opposing dust storm.Realize the process of the construction machinery radiator that simulation dust storm impacts.
The beneficial effect of patent of the present invention is:
(1) adopt three different-diameters, the fan of different leaves angle and diverse location, control rotation speed of the fan based on Monte Carlo method, produce the motion of air-flow in simulation of air flow real atmosphere;
(2) adopt hourglass and control to leak the quantity that the husky unit simulation strong wind measured entrainments dust storm;
(3) the large diameter sandstone of filter screen filtering is adopted, make the dust storm diameter in the distribution of the diameter entrainmenting dust storm and actual desert and Gobi desert similar, simulate Practical Project machinery on the whole when desert and Gobi desert operation, the situation of dust storm impact radiator module, realize the process of the construction machinery radiator that simulation dust storm impacts, the situation of train experiment can be reduced, greatly shorten the new product designs cycle, and improve intensity and the useful life longevity of product.
Accompanying drawing explanation
Fig. 1 (a) is front elevation of the present invention;
Fig. 1 (b) is vertical view of the present invention;
Fig. 1 (c) is side view of the present invention;
Fig. 2 is concrete structure and the blade arrangement of front fan blowing;
Fig. 3 is concrete structure and the blade arrangement of side blow fan;
Fig. 4 is concrete structure and the blade arrangement of bottom surface fan blowing;
Fig. 5 is hourglass and the concrete structure controlling the device leaking husky amount;
Wherein, 1. air in section, the 2. variable-frequency motor of front fan blowing, 3. front fan blowing, 4. side blow fan, the 5. variable-frequency motor of side blow fan, 6. side direction air duct, the 7. variable-frequency motor of bottom surface fan blowing, 8. bottom surface fan blowing, 9. bottom surface air duct, 10. hourglass, 11. heat spreader modules, the 12. stable sections of testing the speed, 13. wind speed measuring devices, 14. filter screens, 15. leading screws.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Fig. 1 (a)-Fig. 1 (c), a kind of construction machinery radiator air tunnel simulated dust storm and impact, comprise an air duct, described air duct comprise connect successively air in section 1, front blowing section, side and bottom surface blowing section, hourglass control section, heat spreader module 11, the stable section of testing the speed 12, wind speed measuring device 13; Be provided with front fan blowing 3 in described front blowing section, described front fan blowing 3 is arranged on the variable-frequency motor 2 of front fan blowing; The side of described side and bottom surface blowing section is provided with side direction air duct 6, the bottom surface of described side and bottom surface blowing section is provided with bottom surface air duct 9, side blow fan 4 is provided with in described side direction air duct 6, described side blow fan 4 is arranged on the variable-frequency motor 5 of side blow fan, be provided with bottom surface fan blowing 8 in described bottom surface air duct 9, described bottom surface fan blowing 8 is arranged on the variable-frequency motor 7 of bottom surface fan blowing; Hourglass 10 is provided with directly over described hourglass control section.
Be provided with filter screen 14 above described hourglass 10, below described hourglass 10, be provided with horizontal leading screw 15.
Described front fan blowing 3 comprises the blade composition of 7 Unequal distance, is respectively: 43 °, 47 °, 53 °, 49 °, 57 °, 59 ° by the angle of the center line of clockwise each blade.The diameter of bottom surface fan blowing 8 is 1/3 of front fan blowing 3 diameter, is made up of the blade of 5 Unequal distance, is respectively by the angle of the center line of clockwise each blade: 71 °, 67 °, 73 °, 77 °, 72 °.The diameter of side blow fan 4 is 1/2 of front fan blowing 3 diameter, is made up of the blade of 5 Unequal distance, is respectively by the angle of the center line of clockwise each blade: 79 °, 71 °, 70 °, 67 °, 73 °.
Described hourglass 10 is for storing sandstone, and the leading screw 15 below described hourglass 10 leaks husky area for adjusting bottom hourglass 10, to reach the effect controlling to leak husky amount.
Described filter screen 14 is for screening out larger-size sandstone, and according to different needs, the filtering accuracy of filter screen 14 is 0.8mm-1.5mm, and the material of filter screen 14 is stainless steel alloy.
Described heat spreader module 11 comprises water radiator, intercooler, oil radiator and their combination, the structural shape of water radiator, intercooler, oil radiator is not for windowing corrugated tube type, ripple belt, serrate, trapezoid belt and pipe type, and material is aldary and aluminium alloy.
The concrete using method of the construction machinery radiator air tunnel that described simulation dust storm impacts is: collect field wind speed flowing change, count the regularity of distribution, then the velocity of rotation of fan is controlled by variable-frequency motor, after the air-flow combination that fan turns has been entrainmented, the air current flow of combination is changed and the similar object realizing simulation dust storm and impact of actual airflow;
The concrete control method of the velocity of rotation of described fan is:
According to the flowing law of air-flow in field environment, adopt quasi-Monte Carlo simulation adjustment rotation speed of the fan situation of change,
Front fan blowing 3 rotating speed n1 meets Weibull distribution rule, and change once continued for 10 seconds:
n1＝2000·(lnr
i)
0.42
Bottom surface fan blowing 8 rotating speed n2 meets Weibull distribution rule, and change once continued for 10 seconds:
n2＝1800·(lnr
i)
0.37
Side blow fan 4 rotating speed n3 meets Weibull distribution rule, and change once continued for 10 seconds:
n3＝1600·(-lnr
i)
0.45
Wherein r
ifor pseudo random number, adopt the simulation of Prime Modulus multiplicative congruential method:
X
i＝16897·X
i-1(mod(2
32-1))
r
i＝X
i/(2
32-1)
Above formula mod() represent the meaning of remainder, X
ifor natural number, wherein X
0=3319; I increases naturally with change frequency, i be greater than 0 natural number.
Described wind speed measuring device 13, adopts on the circular hollow section of the stable section of testing the speed of Pitot tube after test section and measures by six measuring points waiting anchor ring to amass layout, obtain the actual flow velocity of the cooperation downstream of three kinds of fans.
Fan is that blowing mode is blown, and most of air-flow is provided by front fan blowing 3, and the air-flow that side blow fan 4 and bottom surface fan blowing 8 produce and the air-flow weave in that front fan blowing 3 produces, simulate air current flow situation in actual ambient atmosphere.Hourglass 10, after three fans, under the effect of the air-flow that the grains of sand sifted out through hourglass 10 are formed at three fans, rushes at heat spreader module 11, simulates the situation of dust storm impact radiator module 11 in actual desert, Gobi desert.Air-flow through heat spreader module 11 passes through the stable section of testing the speed 12, the velocity-stabilization of air-flow is got off, then measures its flow velocity by pitot tube.
As shown in Figure 2, front fan blowing 3 is made up of the blade of 7 Unequal distance (refer to angle not etc.), is respectively: 43 °, 47 °, 53 °, 49 °, 57 °, 59 ° along a1 to a7 by the angle of the center line of clockwise each blade.
As shown in Figure 3, the diameter of side blow fan 4 is 1/2 of front fan blowing 3 diameter, be made up of the blade of 5 Unequal distance (refer to angle not etc.), be respectively by the angle of the clockwise center line along each blade of b1 to b5: the angle of 79 °, 71 °, 70 °, 67 °, 73 ° fans is different.
As shown in Figure 4, the diameter of bottom surface fan blowing 8 is 1/3 of front fan blowing 3 diameter, is made up of the blade of 5 Unequal distance, is respectively: 71 °, 67 °, 73 °, 77 °, 72 ° by the angle of the clockwise center line along each blade of c1 to c5.
As shown in Figure 5, there is filter screen 14 for controlling the diameter of the grains of sand in the middle of hourglass 10, adopting leading screw 15 to control the base plate of hourglass 10 below, by leading screw 15, rotation being become mobile, leaking husky area for adjusting bottom hourglass 10, to reach the effect controlling to leak husky amount.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (1)
1. simulate the using method of the construction machinery radiator air tunnel that dust storm impacts for one kind, it is characterized in that, the construction machinery radiator air tunnel that described simulation dust storm impacts comprises an air duct, described air duct comprise connect successively air in section, front blowing section, side and bottom surface blowing section, hourglass control section, heat spreader module, the stable section of testing the speed, wind speed measuring device; Be provided with front fan blowing in described front blowing section, described front fan blowing is arranged on the variable-frequency motor of front fan blowing; The side of described side and bottom surface blowing section is provided with side direction air duct, the bottom surface of described side and bottom surface blowing section is provided with bottom surface air duct, side blow fan is provided with in described side direction air duct, described side blow fan is arranged on the variable-frequency motor of side blow fan, be provided with bottom surface fan blowing in the air duct of described bottom surface, described bottom surface fan blowing is arranged on the variable-frequency motor of bottom surface fan blowing; Hourglass is provided with directly over described hourglass control section; Be provided with filter screen above described hourglass, below described hourglass, be provided with horizontal leading screw; Described front fan blowing is made up of the blade of 7 Unequal distance, is respectively by the angle of the center line of clockwise each blade: 43 °, 47 °, 53 °, 49 °, 57 °, 59 °, 52 °; The diameter of described bottom surface fan blowing is 1/3 of front fan blowing diameter, is made up of the blade of 5 Unequal distance, is respectively by the angle of the center line of clockwise each blade: 71 °, 67 °, 73 °, 77 °, 72 °; The diameter of described side blow fan is 1/2 of front fan blowing diameter, is made up of the blade of 5 Unequal distance, is respectively by the angle of the center line of clockwise each blade: 79 °, 71 °, 70 °, 67 °, 73 °; According to different needs, the filtering accuracy of described filter screen is 0.8mm-1.5mm, and the material of filter screen is stainless steel alloy; Described heat spreader module is water radiator, intercooler or oil radiator, the structural shape of water radiator, intercooler or oil radiator is not for windowing corrugated tube type, ripple belt, serrate, trapezoid belt or pipe type, and material is aldary or aluminium alloy; Described wind speed measuring device, adopts Pitot tube to measure by six measuring points waiting anchor ring to amass layout on the circular hollow section of the stable section of testing the speed, records the different wind speed that three kinds of fans coordinate rear air-flow;
Its using method is: collect field wind speed flowing change, count the regularity of distribution, then controlled the velocity of rotation of fan by variable-frequency motor, after the air-flow that fan turns has been entrainmented combination, the air current flow of combination is changed and the similar object realizing simulation dust storm and impact of actual airflow;
The concrete control method of the velocity of rotation of described fan is:
According to the flowing law of air-flow in field environment, adopt quasi-Monte Carlo simulation adjustment rotation speed of the fan situation of change,
Front fan blowing rotating speed n1 meets Weibull distribution rule, and change once continued for 10 seconds:
n1＝2000·(-l nr
i)
0.42
Bottom surface fan blowing rotating speed n2 meets Weibull distribution rule, and change once continued for 10 seconds:
n2＝1800·(-l nr
i)
0.37
Side blow rotation speed of the fan n3 meets Weibull distribution rule, and change once continued for 10 seconds:
n3＝1600·(-l nr
i)
0.45
Wherein r
ifor pseudo random number, adopt the simulation of Prime Modulus multiplicative congruential method:
X
i＝16897·X
i-1(mod(2
32-1))
r
i＝X
i/(2
32-1)
Above formula mod () represents the meaning of remainder, X
ifor natural number, wherein X
0=3319; I increases naturally with change frequency, i be greater than 0 natural number.
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| CN103175672B true CN103175672B (en) | 2015-08-19 |
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